Sennuopu Active Subwoofer Built-in Power Amplifier Speakers High Resolution Audio System Car Sub Woofer Install On Spare Tire - Subwoofers - AliExpress
Carboutique - Spare Tyre subwoofer from Megaaudio In 400... | Facebook
Subwoofer box using the spare tire | DIYMobileAudio.com Car Stereo Forum
For those of you who want more bass but don't want to sacrifice your spare tire or hatch space, I highly recommend this spare tire mount subwoofer : r/GolfGTI
Amazon.com: CERWIN Vega 600 watts Active Spare Tire Application Subwoofers Series (VPAS12ST) : Electronics